Large LCD Screen & Backlight Upgraded hygrometer thermometer with 3.7-inch large LCD display, easier to read from any angle and distance. Features white backlight and touch icon, making it easier to read and light up the screen in dark conditions. MAX MIN Records The digital thermometer displays MAX & MIN humidity and temperature records in the last 24 hours, allowing you to take action in advance, such as adjusting thermostat or humidifier. (Note: Long press the / button to reset the MAX and MIN data.) Accurate & Fast Refresh The indoor thermometer refreshes every 10 seconds to provide the latest readings with sensitive sensors inside. Temperature range: -9.9C to 60C (14.1F to 140F), accuracy 1C; Humidity range: 10% to 95% RH, accuracy 3% RH. Suitable for home indoor, bedroom, baby room, kitchen, greenhouse, guitar room, office, and wine cellar. Comfort Level Indicator The room thermometer features three levels of icons: wet, comfort, and dry, which display the different levels of temperature and humidity based on the air condition, so you can easily monitor and take action for room climate control and health. Smart Design with 3 Buttons Features 12-hour/24-hour time and date (MM/DD) mode, switchable. Powered by 2 x AAA batteries (not included). Easy one-time setup button. This humidity gauge for home is convenient and suitable for indoor and outdoor use. Multiple Mounting Options With a retractable stand and a wall-mount hole, the temperature thermometer is convenient for every type of room. Upgraded Calibration Function When product placement or environmental factors impact data accuracy, you can calibrate the sensor for the most accurate humidity and temperature data. (Temp Max 5C / 41F; Humidity 10% RH.)